Improvement in the construction of rolls



JOHN v. IW'OYODHOY-US'E.

Q Improvement in the Construction of Roi 1's.

[N 21 443 i Patented Nov. 28', #871.

UNITED STATES AENT Orrrcn.

JOHN V. WOODHOUSE, OF MINE LA MOTTE, MISSOURI, ASSIGNOR TO HIMSELF RADGLIFFE B. LOOKWVOOD, AND WVILLIAM A. SCOTT, OF SAME PLACE.

IMPROVEMENT IN THE CONSTRUCTION OF ROLLS.

Specification forming part of Letters Patent No. 121,443, dated November 28, 1871.

To all whom it may concern:

Be it known that I, JOHN V. Woonnousn, of Mine La Motte, in the county of Madison and State of Missouri, have invented certain new and useful Improvements in Rolls for crushing, swaging, and other purposes 5 and I do hereby declare that the following is a full, clear, and exact description of the same, reference being bad to the accompanying drawing forming part of this specification.

The objectof this invention is to construct a roll which, although made in sections, shall possess all the advantages of or be superior to a roll cast in one piece, and be exempt from the disadvantages attendant upon such latter construction. The invention is equally applicable to what are known as solid rolls, which have their central and peripheral portions in the same piece, and to rolls formed of sleeves fitted over hubs which carry the journals or have attached to them the shafts of the rolls, and is more especially designed for rolls of considerable weight or size. It will be found particularly serviceable in rolls used to crush ores of different kinds. In rolls for such purpose, as heretofore constructed, there has been experienced great difficulty in making them both hard and durable; and even rolls made from white iron are unequal in the hardness of their surface. There has also been a constant tendency of such rolls to wear unevenly, and the edges of the rolls, if the iron is very hard, chip off. Furthermore, when a roll is very large the same is inconvenient to handle, and even when .of a sleeve construction it requires a long time and much labor to change an old roll for a new one. This invention obviates these defects and possesses various advantages alike applicable to crushing and swaging rolls, as, for instance, increased'facility of handling, and for breaking up, when necessary, for remeltin g. VVorn-outportions of the rolls also may readily be replaced without destroying the whole roll; or, when a patternroll is used, only the pattern portion may be changed, as alteration in the pattern to be produced is required, and a greater or more uniform hardness and better finish may be given to the roll. To these and other ends the invention consists in a novel construction of roll by dividing the same transversely into a series of disks or rings arranged to lie side by side, and fitted to lock with each other by projections on and corresponding recesses in the sides or facial sin-faces of the disks or rings, conjointly with bolts or fastenings for holding the whole together.

Having thus specified the object and nature of the invention, its description will be proceeded with in reference to the accompanying drawing.

Figure 1 represents a partly-sectional longitudinal View of a sleeve-roll, applicable to crushing and other purposes, constructed in accordance with the invention; Fig. 2, a transverse section of the same, showing a side or face view of one of the roll-sections; and Fig. 3, an end view of the roll complete.

In said drawing, A represents the hub 0r swelled portion of the shaft, and B B B the sleeve portions of the roll. These sleeve or rollsections B B B may be of any desired number, and are arranged to lie side by side or face to face, and so that bosses or projections 12 b on the faces of certain of the sections enter into or fit v correspondingly-shaped and arranged recesses c 0 in the faces of adjacent sections, the center section B only having recesses c c in both of its sides. These bosses and recesses are arranged at suitable distances apart, around or on and in the faces of the sections, and serve to lock the entire sleeve, the same being afterward further secured and the sections drawn or forced up close one against the other by bolts 61 (1 arranged to pass through the several sections, and the heads and nuts of which lie in the recesses c c in the outside faces of the outside sections. The fit of the bosses b I), through which the bolts pass, in the recesses c c relieves the bolts of strain in a transverse direction. It is preferred to make these bosses and the recesses which they fit in the shape of frustums of cones, whereby the sections are more readily fitted together and the bolt holes through the several sections are brought in line with each other. By thus building up the roll, instead of making it or the sleeve portion of it in one piece, the sections of which it is composed may be made separately, either of white iron in the sand or in a chill, and so thin that they can be made much harder and more uniform in the hardness of their surface than is practicable with a roll or roll-sleeve made in one piece. Likewise, in case of any of the sections wearing down faster than the remaining ones, -thereby making an uneven surface to the roll, new sections can besubstituted for the worn ones by first loosening wedges f f, which are inserted in dovetail grooves g g in the shaft or hub A, Within which smaller but correspondinglyshaped tongues h it that project from the rollseetions at their eyes are made to fit for the wedgesf f to take their hearing against. The roll or roll-sleeve being thus loosened the bolts d (l are taken out when the sections are taken apart and changed, as required.

In making rolls for rolling or swaging different patterns in metal or other material the central or intermediate section or sections may only have the converse of the pattern impressed upon them and the two end sections be left plain, so that whenever it is required to substitute one pattern for another the pattern-section or sections need be the only one or ones that require to be changed; and the same roll otherwise is made to answer for numerous patterns.

What is here claimed, and desired to be secured by Letters Patent, is-

1. A. roll or roll-sleeve, composed of a series of transverse sections constructed to lock with each other, by means of the projections b and recesses c on or in their faces, and bolted or united together, substantially as specified.

2. The combination of the grooves g in the hub A with the tongues h on the inner periphery of the sleeve-sections and their looking-keys f, substantially as described.

JOHN V. WOODHOUSE.

Witnesses:

BEN. (JoLMAN.

ALLAN H. BACON. 125 

